CVE-2026-66440

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-06. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Unauthenticated Cross Site Scripting (XSS) in WPIDE – File Manager & Code Editor <= 3.5.7 versions.

CVSS v3
7.1
EG Score
7.1(high)
EG Risk
32(Track)
EG Risk 32/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 12, 2026

References (1)

Vendor Advisories for CVE-2026-66440(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 26× in last 7d / 57× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 03:29 UTCEG score recompute
  2. 2026-08-21 03:29 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 14:19 UTCGHSA enrichment
  5. 2026-08-20 00:36 UTCEG score recompute
  6. 2026-08-20 00:36 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 11:24 UTCGHSA enrichment
  9. 2026-08-18 22:14 UTCEG score recompute
  10. 2026-08-18 22:14 UTCGHSA enrichment
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-18 08:59 UTCGHSA enrichment
  13. 2026-08-17 19:46 UTCEG score recompute
  14. 2026-08-17 19:46 UTCGHSA enrichment
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-17 06:33 UTCGHSA enrichment
  17. 2026-08-16 17:19 UTCEG score recompute
  18. 2026-08-16 17:19 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 04:08 UTCEG score recompute
  21. 2026-08-16 04:08 UTCGHSA enrichment
  22. 2026-08-15 14:58 UTCGHSA enrichment
  23. 2026-08-15 01:47 UTCEG score recompute
  24. 2026-08-15 01:47 UTCGHSA enrichment
  25. 2026-08-15 01:30 UTCEPSS rescore
Show 32 more
  1. 2026-08-14 12:37 UTCGHSA enrichment
  2. 2026-08-13 23:27 UTCEG score recompute
  3. 2026-08-13 23:27 UTCGHSA enrichment
  4. 2026-08-13 22:00 UTCEPSS rescore
  5. 2026-08-13 10:16 UTCGHSA enrichment
  6. 2026-08-12 21:05 UTCEG score recompute
  7. 2026-08-12 21:05 UTCGHSA enrichment
  8. 2026-08-12 13:51 UTCEPSS rescore
  9. 2026-08-12 10:11 UTCGHSA enrichment
  10. 2026-08-11 20:59 UTCEG score recompute
  11. 2026-08-11 20:59 UTCGHSA enrichment
  12. 2026-08-11 07:49 UTCEG score recompute
  13. 2026-08-11 07:49 UTCGHSA enrichment
  14. 2026-08-11 00:00 UTCEPSS rescore
  15. 2026-08-10 18:38 UTCGHSA enrichment
  16. 2026-08-10 05:28 UTCGHSA enrichment
  17. 2026-08-09 16:17 UTCEG score recompute
  18. 2026-08-09 16:17 UTCGHSA enrichment
  19. 2026-08-09 13:47 UTCEPSS rescore
  20. 2026-08-09 03:07 UTCEG score recompute
  21. 2026-08-09 03:07 UTCGHSA enrichment
  22. 2026-08-08 16:37 UTCEPSS rescore
  23. 2026-08-08 13:57 UTCGHSA enrichment
  24. 2026-08-08 00:46 UTCEG score recompute
  25. 2026-08-08 00:46 UTCGHSA enrichment
  26. 2026-08-07 11:36 UTCEG score recompute
  27. 2026-08-07 11:35 UTCGHSA enrichment
  28. 2026-08-06 22:23 UTCEG score recompute
  29. 2026-08-06 22:23 UTCGHSA enrichment
  30. 2026-08-06 15:27 UTCEG score recompute
  31. 2026-08-06 14:42 UTCEG score recompute
  32. 2026-08-06 14:41 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66440?
CVE-2026-66440 is a high vulnerability published on August 6, 2026. Unauthenticated Cross Site Scripting (XSS) in WPIDE – File Manager & Code Editor <= 3.5.7 versions.
When was CVE-2026-66440 disclosed?
CVE-2026-66440 was first published in the National Vulnerability Database on August 6, 2026, with the most recent update on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66440 actively exploited?
CVE-2026-66440 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.9% of all scored CVEs.
What is the CVSS score of CVE-2026-66440?
CVE-2026-66440 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-66440?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66440, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-66440

Explore →

Is Your Infrastructure Affected by CVE-2026-66440?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs